Tag: missing-prerequisite-for-pyproject-backend Severity: info Check: languages/python Explanation: pybuild now supports building with PEP-517 standard interfaces natively. These sources could be built using pybuild's generic pyproject plugin and the named build backend. . Please declare both named prerequisites in Build-Depends. You will need both the generic pybuild-plugin-pyproject as well as the specific one to the named backend. It is usually python3-${backend}. . No changes are required if you are using pybuild's dedicated flit plugin, although that plugin will eventually be deprecated in favor of the generic pyproject plugin mentioned above.